:root {
  --bg: #f5f7fa;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --accent: #2563eb;
  --border: #e5e7eb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}

header {
  background: linear-gradient(135deg, #1e3a8a, #2563eb);
  color: white;
  padding: 48px 0;
}

header h1 {
  margin: 0;
  font-size: 2.6rem;
}

.subtitle {
  margin-top: 8px;
  font-size: 1.1rem;
  opacity: 0.9;
}

nav {
  margin-top: 20px;
}

nav a {
  color: white;
  margin-right: 20px;
  text-decoration: none;
  font-weight: 500;
}

nav a:hover {
  text-decoration: underline;
}

.container {
  max-width: 1100px;
  margin: auto;
  padding: 0 24px;
}

main {
  padding: 40px 0;
}

h2 {
  margin-top: 60px;
  border-bottom: 2px solid var(--border);
  padding-bottom: 6px;
}

.summary li {
  margin-bottom: 6px;
}

.note {
  background: #eef2ff;
  padding: 12px 16px;
  border-left: 4px solid var(--accent);
  margin-top: 16px;
}

.benchmark {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  margin-top: 32px;
}

.benchmark h3 {
  margin-top: 0;
}

.charts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 16px 0;
}

.charts img {
  width: 100%;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: white;
}

.chart-note {
  color: var(--muted);
  font-style: italic;
}

.repo-link {
  font-weight: 600;
  color: var(--accent);
}

footer {
  text-align: center;
  padding: 24px;
  color: var(--muted);
  border-top: 1px solid var(--border);
  margin-top: 60px;
}

.table-container {
  overflow-x: auto;
  margin: 20px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background: white;
}

th, td {
  border: 1px solid #ddd;
  padding: 8px 10px;
  text-align: left;
}

th {
  background: #f4f6f8;
  font-weight: 600;
}

tr:nth-child(even) {
  background: #fafafa;
}

.hidden {
  display: none;
}

button {
  margin-left: 10px;
  padding: 4px 10px;
  font-size: 13px;
  cursor: pointer;
}